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2004-09-01 Andreas Schwab <schwab@suse.de> * sysdeps/unix/sysv/linux/ia64/sys/ucontext.h [g++ >= 3.5]: Use __builtin_offsetof.
git-mirror · Sep 2, 2004 · 86aca5a · 86aca5a
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,8 @@
+2004-09-01  Andreas Schwab  <schwab@suse.de>
+
+	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h [g++ >= 3.5]: Use
+	__builtin_offsetof.
+
 2004-09-01  Jakub Jelinek  <jakub@redhat.com>
 
 	[BZ #361]

diff --git a/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h b/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -32,7 +32,10 @@
 
 typedef struct sigcontext mcontext_t;
 
-#ifdef __GNUC__
+#if defined __cplusplus && __GNUC_PREREQ (3, 5)
+# define _SC_GR0_OFFSET	\
+	__builtin_offsetof (struct sigcontext, sc_gr[0])
+#elif defined __GNUC__
 # define _SC_GR0_OFFSET	\
 	(((char *) &((struct sigcontext *) 0)->sc_gr[0]) - (char *) 0)
 #else